Square Root Calculator › Square root of 644
Square Root of 644
√644 ≈ 25.377155
644 is not a perfect square, so √644 is an irrational number that is approximately 25.377155. In simplified radical form, √644 = 2√161.
√644 lies between √625 = 25 and √676 = 26.
| Number | 644 |
| Square root (decimal) | 25.377155 |
| Simplified radical | 2√161 |
| Perfect square? | No |
| Rational? | No |
Calculate another square root
Nearby square roots
Frequently asked questions
Is 644 a perfect square?
No, 644 is not a perfect square, so its square root is irrational and approximately 25.377155.
What is the square root of 644 in simplest radical form?
√644 = 2√161 in simplest radical form.